Tag Archive : drum dryer

What Are The Key Steps in NPK Fertilizer Production Technology?

In the world of agriculture, the role of fertilizers is paramount in ensuring optimal crop growth and yield. Among these fertilizers, NPK fertilizers, which contain essential nutrients like nitrogen (N), phosphorus (P), and potassium (K), play a vital role in providing plants with the elements necessary for robust development.

Step 1: Raw Material Selection and Preparation

The journey of NPK fertilizer production begins with the careful selection of raw materials. These materials typically include sources of nitrogen, phosphorus, and potassium. Common nitrogen sources include urea or ammonium nitrate, while phosphorus may be derived from phosphate rocks. Potassium, on the other hand, is often obtained from potash. These raw materials undergo thorough testing to ensure they meet quality standards.

Once selected, the raw materials undergo preparation processes, including crushing and grinding, to achieve a consistent particle size. This step is crucial for the subsequent blending process, ensuring a homogeneous mix of nutrients in the final product.

NPK fertilizer pellet manufacturing products

NPK fertilizer pellet manufacturing products

Step 2: Blending

Blending is a pivotal step in NPK fertilizer production process, where the various raw materials are mixed in precise proportions to achieve the desired nutrient ratios. The formulation is carefully calculated based on the specific needs of different crops or target applications. Advanced technology like SX’s NPK blending fertilizer production process ensures accurate and uniform blending, guaranteeing a balanced nutrient composition in every granule of the final fertilizer product.

BB Fertilizer Blending Line

BB Fertilizer Blending Line

Step 3: Granulation

To enhance the efficiency of NPK fertilizers and facilitate ease of application, granulation is a key step. Granulation involves forming small granules from the blended materials to provide controlled nutrient release and prevent nutrient leaching. So you can choose techniques such as drum granulation, pan granulation, or extrusion granulation to achieve the desired granule size, density, and mechanical strength.

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NPK Fertilizer Granulation Production Line of Extrusion Technique

NPK Fertilizer Granulation Production Line of Extrusion Technique

Step 4: Drying & Cooling

After granulation, the newly formed fertilizer granules undergo a drying process to remove excess moisture. Proper drying is crucial to prevent caking and improve the shelf life of the fertilizer. Various drying methods, including Shunxin’s rotary dryers, are employed to achieve optimal moisture content.

To prevent granules from clumping and improve their appearance, a cooling process is implemented after drying. This aids in stabilizing the granules and increases their resistance to breakage during storage and transportation.

Drying Machine on The Market

Drying Machine on The Market

Step 5: Screening & Coating

To enhance the quality and appearance of the final product, the fertilizer granules undergo screening to remove any oversize or undersize particles. Additionally, coating may be applied to the granules to enhance their nutrient release properties or add specific additives for targeted functionality. SX rotary screening machine and coating machine can help you achieve good effect.

Step 6: Packaging and Quality Control

The final step in NPK fertilizer production technique is packaging and quality control. The finished fertilizer is carefully packaged into bags, bins, or bulk containers, ensuring proper labeling and identification. Meanwhile, Shunxin has automatic bagging production line can help you do filling, sewing, weighing, and other works. Stringent quality control measures are put in place to verify the nutrient content, granule size, and overall product integrity. This step ensures that farmers and consumers receive fertilizers that meet regulatory standards and deliver optimal results.


NPK fertilizer production technology encompasses a series of intricate steps that aim to provide essential nutrients to plants, maximize agricultural productivity, and promote sustainable farming practices. From raw material selection and preparation to granulation, drying, and coating, each stage plays a vital role in creating effective and efficient NPK fertilizers. You can visit this website: for more details.


Why Is Necessary to Use Drum Dryer or Cooler After Granulation?

In the realm of fertilizer production, two essential machines play pivotal roles: dryers and coolers. These machines are fundamental in both organic fertilizer manufacturing processes and compound fertilizer production lines, and their functions are integral to the entire operation.

Drum Cooler — Temperature Control for Quality

Drum cooler is a machine designed to lower the temperature of granular fertilizers. Its significance reverberates through the entire organic fertilizer production process and NPK fertilizer production line. With the help of this machine, dried fertilizer granules are maintained in an optimal state, facilitating their transport, storage, packaging, and sale. For example, if compound fertilizer production line runs without this cooling machine, the granules would absorb moisture and clump together.

Fertilizer Cooling Machine

Fertilizer Cooling Machine

Drum Dryer — Precision Drying for Optimal Results

Now, let’s shift our focus to the fertilizer rotary drum dryer, which is a machine proficient in drying granular fertilizers and even fresh animal manure such as cow dung, chicken droppings, horse manure, and poultry droppings. This machine uses aeration drying technology to reduce the moisture content of the materials effectively. Our company offers drum dryers with advanced designs, ensuring your drying process is not just efficient but also incredibly convenient. We go the extra mile by providing professional advice according to your specific needs, with machines available at competitive prices.

Drum Drying Machine

Drum Drying Machine

What Technology Does The Drum Dryer Apply?

Drying techniques in fertilizer dryers are a critical aspect of the entire process. The fertilizer dryer is the linchpin of fertilizer production lines, ensuring the perfect drying of organic or compound granular fertilizers. Using aeration drying technology, our rotary drum dryers employ hot air furnace to dry the materials within the drum. The rotating drum enhances the drying effect, ensuring uniform drying of the materials. When using drum dryers, a variety of fuels such as oil, natural gas, biomass, and coal can supply the hot air. Precise control of the drying temperature is paramount, as different materials have varying temperature requirements due to their unique characteristics.

Drying Machine on The Market

Drying Machine on The Market

After granulation, the granules are in a high-temperature and high-moisture state due to the wet granulation technique used for organic fertilizers. At this juncture, a fertilizer dryer steps in, reducing their moisture content significantly.

It is usually equipped with drum cooler. This is because the organic fertilizer granules, after drying, are laden with liquid droplets on their surface. Moreover, these granules are at a high temperature. The cooler not only reduces the granule temperature but also cools these liquid droplets.

Understanding the intricate dance between dryers, coolers, and the organic fertilizer production process is vital. You can click this link: for more details!